I am now the proud owner of nearly 300 .375 Sierra Gamekings. What are you guys shooting?

Rich
Buff Killer

In a 375 H&H Magnum, IMR 4064 or RL-15 should work fine. Another choice but I never found to be as accurate was IMR-4350. IMR 4350 always seems like a harder kicking powder in my 06's and H&H's!

For me it's RL-15 with both 270 and 300 gr. bullets in my 375 H&H Mag.

My .375 Wby won't shoot 'em. Tried IMR 4064 and the 4831's. Wound up using them seated way out to fireform H&H brass to my chamber using a very light load. Sorry.

Have had good luck with both Rl-15 and Varget behind the 300 gr slugs in ruger 375..